CN209181268U - Efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater - Google Patents
Efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater Download PDFInfo
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- CN209181268U CN209181268U CN201821774712.9U CN201821774712U CN209181268U CN 209181268 U CN209181268 U CN 209181268U CN 201821774712 U CN201821774712 U CN 201821774712U CN 209181268 U CN209181268 U CN 209181268U
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Abstract
A kind of efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater, including water tank, the first water pump, the second water pump and electric heater, the first outlet of water tank is connected with the entrance of the first water pump, the outlet of first water pump is connected with the first cut-off valve inlet, the outlet of first shut-off valve is connected with the entrance of the second shut-off valve, the outlet of second shut-off valve is connected with the entrance of air cooler first, and the first outlet of air cooler is connected with the first entrance of water tank；Cold water inlet is connected with the entrance of third shut-off valve, and the outlet of third shut-off valve is connected with the entrance of the 4th shut-off valve.Thermodynamic principles of the utility model based on cascaded utilization of energy, the cascade system formed by low-temperature level of subcritical cycle and using trans critical cycle as high-temperature level, by the ingenious combination of different heating mode, play the advantage of different step energy, reduce air cooler outlet temperature under low temperature, increase the heat absorbed from air with this, promote Overall energy efficiency, system can be run under -40 DEG C of extremely low temperature.
Description
Technical field
The utility model belongs to water heater, is related to a kind of air source hot pump water heater.
Background technique
In view of the characteristics and advantages of Trans-critical cycle heat pump cycle, Trans-critical cycle air source heat pump becomes the primary study of art of heat pumps
With development object.Trans-critical cycle air source heat pump can use CO2Working medium, compared to traditional halogenated hydrocarbon (freon class), working medium is more
Environmental protection, greenhouse effects are lower, are easier to obtain.Further, since working medium is in postcritical characteristic and especially to fit in its air cooler
It closes and the higher hot water of temperature is produced by counterflow heat exchange, it is more energy saving.
But this kind of heat pump inevitably will appear in use hot water it is static in water tank when cause temperature reduce need recycle plus
The situation of heat, its efficiency is with regard to lower at this time.It is more fatal, with the expansion of application surface, when it is used for low temperature environment, as in
State's north of china in winter can generally drop to -10 DEG C or even -20 DEG C hereinafter, this kind of heat pump efficiency rapid decrease.The reason is as follows that figure institute
Show (10 DEG C of former evaporating temperature, -20 DEG C of north of china in winter evaporating temperature), is reduced along with evaporating temperature, the fast prompt drop of pressure of inspiration(Pi)
Low, since the pressure ratio variation of compressor is limited, pressure at expulsion also necessarily declines, such as falls to as shown in the figure from 10MPa
7MPa.It is constant to generate hot water, such as when temperature is 65 DEG C, then 65 DEG C of thermoisopleths and 10MPa and 7MPa isobar intersection point are respectively a
And b, it may be seen that b point has moved right very big distance compared to a, this, which causes to expand respectively from a point and b point, reaches corresponding
Evaporating temperature after c point differ larger with the position of e point, line segment ef is very short, significantly shorter than cd, it means that ef is corresponding
The heat that process evaporator is absorbed from air is considerably less, i.e. the efficiency of system is very low, is in close proximity to 1, it is contemplated that compressor
Efficiency, leakage heat loss, pressure loss etc., efficiency is likely lower than traditional electric heating.
Summary of the invention
In order to overcome the lower deficiency of efficiency of existing Trans-critical cycle air source heat pump, in order to improve the above problem, this is practical
The novel thermodynamic principles based on cascaded utilization of energy, using using subcritical cycle is low-temperature level and using trans critical cycle as high temperature
Circulating-heating, directly-heated and the ingenious combination of electric heating Three models are played the excellent of different step energy by the cascade system of grade composition
Gesture reduces air cooler outlet temperature under low temperature, increases the heat absorbed from air with this, optimizes operation of heat pump operating condition, is promoted total
Physical efficiency effect, system can be run under -40 DEG C of extremely low temperature.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater, including water tank, evaporator, the first compression
Machine, evaporative condenser, first throttling device, the second compressor, air cooler, second throttling device, the first water pump, the second water pump and
Electric heater, the first outlet of the water tank are connected with the entrance of the first water pump, outlet and the first shut-off valve of the first water pump
Entrance is connected, and the outlet of the first shut-off valve is connected with the entrance of the second shut-off valve, and the of the outlet of the second shut-off valve and air cooler
One entrance is connected, and the first outlet of air cooler is connected with the first entrance of water tank；The entrance of cold water inlet and third shut-off valve
Be connected, the outlet of third shut-off valve is connected with the entrance of the 4th shut-off valve, the outlet of the 4th shut-off valve at the same with the first shut-off valve
Outlet be connected with the entrance of the second shut-off valve；The outlet of third shut-off valve is also connected with the entrance of the 5th shut-off valve, and the 5th section
Only the outlet of valve is connected with the third entrance of water tank；The second outlet of water tank is connected with the entrance of the second water pump, the second water pump
Outlet is connected with the entrance of electric heater, and the outlet of electric heater is connected with the entrance of the 6th shut-off valve, and the 6th shut-off valve goes out
Mouth is connected with the entrance of the 7th shut-off valve, and the outlet of the 7th shut-off valve is connected with the second entrance of water tank；The third of water tank exports
It is connected with the entrance of the 8th shut-off valve, the outlet of the 8th shut-off valve is connected with the 9th cut-off valve inlet, the outlet of the 9th shut-off valve
It is connected with user；The outlet of 6th shut-off valve is also connected with the entrance of the 9th shut-off valve；The outlet of evaporator and the first compressor
Entrance be connected, the outlet of the first compressor is connected with the first entrance of evaporative condenser, the first outlet of evaporative condenser and
The entrance of first throttling device is connected, and the outlet of first throttling device is connected with the entrance of evaporator, and the second of evaporative condenser
Outlet is connected with the entrance of the second compressor, and the outlet of the second compressor is connected with the second entrance of air cooler, and the of air cooler
Two outlets are connected with the entrance of second throttling device, and the outlet of second throttling device is connected with the second entrance of evaporative condenser.
Further, the first outlet of water tank is located at water tank bottom, and water tank second outlet is located at tank top, and water tank third goes out
Mouth is located in the middle part of water tank.
The water heater further includes controller, first shut-off valve, the second shut-off valve, third shut-off valve, the 4th cut-off
Valve, the 5th shut-off valve, the 6th shut-off valve, the 7th shut-off valve, the 8th shut-off valve, the 9th shut-off valve are connect with the controller.
The water heater further includes the first temperature sensor, second temperature sensor, third temperature sensor and the 4th temperature
Sensor is spent, first temperature sensor is located at tank top, and second temperature sensor is located in the middle part of water tank, and third temperature passes
Sensor is located at water tank bottom, and the 4th temperature sensor is environment temperature sensor, and the controller is also passed with the first temperature
Sensor, second temperature sensor, third temperature sensor and the connection of the 4th temperature sensor.
The water heater further includes the flow sensor whether fetched water for detecting user, and the flow sensor is located at heat
Between hydrophone exit, the i.e. outlet of the 8th shut-off valve and the 9th cut-off valve inlet, the flow sensor and the controller
Connection.
The beneficial effects of the utility model are mainly manifested in: when running under 1. low temperature, and tank hot water is lower than set temperature
When less, electric heating such as may be lower than using circulating its efficiency of heating instead, therefore fetch water using from tank top, and consume
A small amount of electric energy supplies user after directly heating, with guaranteed efficiency.2. run under low temperature, and when tank hot water's temperature is lower, from
Water tank bottom water intaking carries out circulating-heating by cascade type heat pump, as far as possible reduction air cooler outlet temperature, improves efficiency.
3. run under low temperature, when water tank needs moisturizing, heated using directly-heated type, is the higher form of efficiency.
Detailed description of the invention
Fig. 1 is existing Trans-critical cycle air source heat pump efficiency with evaporating temperature reduction schematic diagram.
Fig. 2 is the schematic diagram of efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater, wherein 1: electric heating
Device；2: the second water pumps；3: the first temperature sensors；4: second temperature sensor；5: third temperature sensor；6: water tank；7: control
Device processed；8: the first water pumps 9: flow sensor；18: the first shut-off valves；16: the second shut-off valves；14: third shut-off valve；15: the four
Shut-off valve；17: the five shut-off valves；11: the six shut-off valves；12: the seven shut-off valves；13: the eight shut-off valves；10: the nine shut-off valves；
19: air cooler；20: second throttling device；21: evaporative condenser；22: the second compressors；23: first throttling device；24: the four
Temperature sensor；25: evaporator；26: the first compressors.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.
Referring to Fig. 2, a kind of efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater, including water tank 6, evaporator
25, the first compressor 26, evaporative condenser 21, first throttling device 23, the second compressor 22, the throttling dress of air cooler 19, second
Set the 20, first water pump 8, the second water pump 2, electric heater 1, the first shut-off valve 18, the second shut-off valve 16, third shut-off valve 14,
Four shut-off valves 15, the 5th shut-off valve 17, the 6th shut-off valve 11, the 7th shut-off valve 12, the 8th shut-off valve 13, the 9th shut-off valve 10,
First temperature sensor 3, second temperature sensor 4, third temperature sensor 5, the 4th temperature sensor 2 and flow sensor 7,
The first outlet of the water tank is connected with the entrance of the first water pump, and the outlet of the first water pump is connected with the entrance of the first shut-off valve,
The outlet of first shut-off valve is connected with the entrance of the second shut-off valve, the outlet and the first entrance phase of air cooler of the second shut-off valve
Even, the first outlet of air cooler is connected with the first entrance of water tank；Cold water inlet is connected with the entrance of third shut-off valve, third
The outlet of shut-off valve is connected with the entrance of the 4th shut-off valve, the outlet of the 4th shut-off valve simultaneously with the outlet of the first shut-off valve and the
The entrance of two shut-off valves is connected；The outlet of third shut-off valve is also connected with the entrance of the 5th shut-off valve, the outlet of the 5th shut-off valve
It is connected with the third entrance of water tank；The second outlet of water tank is connected with the entrance of the second water pump, and the outlet of the second water pump and electricity add
The entrance of hot device is connected, and the outlet of electric heater is connected with the entrance of the 6th shut-off valve, the outlet of the 6th shut-off valve and the 7th section
Only the entrance of valve is connected, and the outlet of the 7th shut-off valve is connected with the second entrance of water tank；The third outlet of water tank and the 8th cut-off
The entrance of valve is connected, and the outlet of the 8th shut-off valve is connected with the 9th cut-off valve inlet, and the outlet of the 9th shut-off valve is connected with user；
The outlet of 6th shut-off valve is also connected with the entrance of the 9th shut-off valve；The outlet of evaporator is connected with the entrance of the first compressor,
The outlet of first compressor is connected with the first entrance of evaporative condenser, the first outlet and first throttling device of evaporative condenser
Entrance be connected, the outlet of first throttling device is connected with the entrance of evaporator, the second outlet of evaporative condenser with second press
The entrance of contracting machine is connected, and the outlet of the second compressor is connected with the second entrance of air cooler, the second outlet of air cooler and second
The entrance of throttling set is connected, and the outlet of second throttling device is connected with the second entrance of evaporative condenser.
Further, the first outlet of water tank is located at water tank bottom, and water tank second outlet is located at tank top, and water tank third goes out
Mouth is located in the middle part of water tank.
The water heater further includes controller, first shut-off valve, the second shut-off valve, third shut-off valve, the 4th cut-off
Valve, the 5th shut-off valve, the 6th shut-off valve, the 7th shut-off valve, the 8th shut-off valve, the 9th shut-off valve are connect with the controller.
The water heater further includes the first temperature sensor, second temperature sensor, third temperature sensor and the 4th temperature
Sensor is spent, first temperature sensor is located at tank top, and second temperature sensor is located in the middle part of water tank, and third temperature passes
Sensor is located at water tank bottom, and the 4th temperature sensor is environment temperature sensor, and the controller is also passed with the first temperature
Sensor, second temperature sensor, third temperature sensor and the connection of the 4th temperature sensor.
The water heater further includes the flow sensor whether fetched water for detecting user, and the flow sensor is located at heat
Between hydrophone exit, the i.e. outlet of the 8th shut-off valve and the 9th cut-off valve inlet, the flow sensor and the controller
Connection.
The operational mode of the present embodiment is as follows:
The first, low temperature electric heating is directly discharged Water supplement pattern
When the 4th temperature sensor 24 detects that environment temperature is low (as being lower than 0 DEG C), and second temperature sensor 4 detects
It is only slightly lower than water outlet temperature setting value to water tank water temperature, if flow sensor 9 detects that user fetches water at this time, if starting heat pump
Heating is since environment temperature is low and the high heat pump efficiency of water tank temperature is extremely low, it is contemplated that line loss, leakage heat loss etc. is even lower than
Electric heating, so using the straight water exit mode of electric heating at this time, i.e., electric heater 1 starts, the second water pump 2 and the 6th shut-off valve 11
Open, the 7th shut-off valve 12 and the 8th shut-off valve 13 are closed, while second, third, the 4th shut-off valve (14-16) and the second pressure
Contracting machine 22 and the first compressor 26 are also opened, progress directly-heated Water supplement pattern, and the first shut-off valve 18, the 5th shut-off valve 17 and first
Water pump 8 is closed.
The second, low-temperature circulating heats water storage mode
When the 4th temperature sensor 24 detects that environment temperature is low (as being lower than 0 DEG C), use is not detected in flow sensor 9
Family water intaking, and second temperature sensor 4 detects that water tank water temperature is relatively low (as lower than 25 DEG C), is heated at this time using heat pump cycle
Certain efficiency can be maintained, so the first water pump 8, the second shut-off valve 16,22 He of the first shut-off valve 18 and the second compressor
First compressor 26 is opened, remaining all devices and valve are closed.
Third, low temperature electric heating circulation water storage mode
When the 4th temperature sensor 24 detects that environment temperature is low (as being lower than 0 DEG C), use is not detected in flow sensor 9
Family water intaking, and second temperature sensor 4 detects that water tank water temperature is more farsighted and is higher than environment temperature and only slightly lower than leaving water temperature
When setting value, if starting heat pump is since environment temperature is low and the high heat pump efficiency of water tank temperature is extremely low, it is contemplated that line loss,
The even lower than electric heating such as heat loss is leaked, and user is not eager to use water, so using electric heating circulation mode, i.e. electric heating at this time
Device 1 starts, and the second water pump 2, the 6th shut-off valve 11 and the 7th shut-off valve 12 are also opened, remaining all devices and valve are closed.
4th, low temperature/room temperature directly-heated Water supplement pattern
When flow sensor 9 detects user's water intaking, environment temperature is detected regardless of the 4th temperature sensor 24
(i.e. low temperature or room temperature), and second temperature sensor 4 detects that water tank water temperature is only slightly lower than water outlet temperature setting value, adopts at this time
With heat pump directly-heated type heating can achieve certain efficiency, so at this time use heat pump directly-heated mode, i.e., second, third, the 4th
Shut-off valve (14-16) and the second compressor 22 and the first compressor 26 are opened, remaining all devices and valve are closed.
5th, normal temperature circulation heats water storage mode
When the 4th temperature sensor 24 detects that environment temperature is higher (such as 20 DEG C or so), and second temperature sensor 4
Detect that water tank water temperature lower than water outlet temperature setting value, can achieve certain efficiency using heat pump cycle heating at this time, i.e., the
One water pump 8, the second shut-off valve 16, the first shut-off valve 18 and the second compressor 22 and the first compressor 26 are opened, remaining institute
There are equipment and valve to close.
Claims (5)
1. a kind of efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater, which is characterized in that including water tank, evaporation
Device, the first compressor, evaporative condenser, first throttling device, the second compressor, air cooler, second throttling device, the first water
Pump, the second water pump and electric heater, the first outlet of the water tank are connected with the entrance of the first water pump, the outlet of the first water pump and
The entrance of first shut-off valve is connected, and the outlet of the first shut-off valve is connected with the entrance of the second shut-off valve, the outlet of the second shut-off valve
It is connected with the first entrance of air cooler, the first outlet of air cooler is connected with the first entrance of water tank；Cold water inlet and third
The entrance of shut-off valve is connected, and the outlet of third shut-off valve is connected with the entrance of the 4th shut-off valve, and the outlet of the 4th shut-off valve is simultaneously
It is connected with the entrance of the outlet of the first shut-off valve and the second shut-off valve；Entrance of the outlet of third shut-off valve also with the 5th shut-off valve
It is connected, the outlet of the 5th shut-off valve is connected with the third entrance of water tank；The second outlet of water tank is connected with the entrance of the second water pump,
The outlet of second water pump is connected with the entrance of electric heater, and the outlet of electric heater is connected with the entrance of the 6th shut-off valve, and the 6th
The outlet of shut-off valve is connected with the entrance of the 7th shut-off valve, and the outlet of the 7th shut-off valve is connected with the second entrance of water tank；Water tank
Third outlet be connected with the entrance of the 8th shut-off valve, the outlet of the 8th shut-off valve with the 9th end valve inlet be connected, the 9th section
Only the outlet of valve is connected with user；The outlet of 6th shut-off valve is also connected with the entrance of the 9th shut-off valve；The outlet of evaporator with
The entrance of first compressor is connected, and the outlet of the first compressor is connected with the first entrance of evaporative condenser, evaporative condenser
First outlet is connected with the entrance of first throttling device, and the outlet of first throttling device is connected with the entrance of evaporator, evaporates cold
The second outlet of condenser is connected with the entrance of the second compressor, and the outlet of the second compressor is connected with the second entrance of air cooler,
The second outlet of air cooler is connected with the entrance of second throttling device, and the second of the outlet of second throttling device and evaporative condenser
Entrance is connected.
2. efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater as described in claim 1, which is characterized in that institute
The first outlet for stating water tank is located at water tank bottom, and water tank second outlet is located at tank top, and the outlet of water tank third is located in water tank
Portion.
3. efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater as claimed in claim 1 or 2, feature exist
In the water heater further includes controller, first shut-off valve, the second shut-off valve, third shut-off valve, the 4th shut-off valve,
Five shut-off valves, the 6th shut-off valve, the 7th shut-off valve, the 8th shut-off valve, the 9th shut-off valve are connect with the controller.
4. efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater as claimed in claim 3, which is characterized in that institute
Stating water heater further includes the first temperature sensor, second temperature sensor, third temperature sensor and the 4th temperature sensor, institute
It states the first temperature sensor and is located at tank top, second temperature sensor is located in the middle part of water tank, and third temperature sensor is located at water
Bottom portion, the 4th temperature sensor are environment temperature sensor；The controller also with the first temperature sensor, second temperature
Spend sensor, third temperature sensor and the connection of the 4th temperature sensor.
5. efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater as claimed in claim 3, which is characterized in that institute
Stating water heater further includes the flow sensor whether fetched water for detecting user, and the flow sensor is located at outlet of water heater
Between place, the i.e. outlet of the 8th shut-off valve and the 9th cut-off valve inlet, the flow sensor is connect with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821774712.9U CN209181268U (en) | 2018-10-31 | 2018-10-31 | Efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821774712.9U CN209181268U (en) | 2018-10-31 | 2018-10-31 | Efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater |
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| Publication Number | Publication Date |
|---|---|
| CN209181268U true CN209181268U (en) | 2019-07-30 |
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ID=67362624
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821774712.9U Active CN209181268U (en) | 2018-10-31 | 2018-10-31 | Efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307362A (en) * | 2018-10-31 | 2019-02-05 | 浙江工业大学 | Efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater |
-
2018
- 2018-10-31 CN CN201821774712.9U patent/CN209181268U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307362A (en) * | 2018-10-31 | 2019-02-05 | 浙江工业大学 | Efficient extremely low temperature Trans-critical cycle overlapping air source heat pump water heater |
| CN109307362B (en) * | 2018-10-31 | 2024-03-26 | 浙江工业大学 | High-efficiency extremely-low-temperature transcritical overlapping air source heat pump water heater |
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